Toronto - Air Quality Health Index

Observed ConditionsFootnote †

Calculated at: 12:00 AM EST Friday 31 January 2025

4Moderate Risk




1
2
3
4
5
6
7
8
9
10
+

Low Risk
(1-3)

Moderate Risk
(4-6)

High Risk
(7-10)

Very High Risk



At-Risk Population:

General Population:

  • No need to modify your usual outdoor activities unless you experience symptoms such as coughing and throat irritation.

Forecast Maximums

Issued at: 5:00 PM EST Thursday 30 January 2025

Thursday night

4 - Moderate Risk

Friday

4 - Moderate Risk

Friday night

3 - Low Risk

Saturday

3 - Low Risk

Who is at risk?

People with heart and lung conditions are most affected by air pollution.

To find out if you are at risk, consult the health guide, your physician, or your local health authority.

Visit the national AQHI Web site to learn more about the AQHI.

Did you know...?

High levels of air pollution can trigger or worsen asthma attacks. Asthma is the #1 cause of hospital admissions among children.


The AQHI is an initiative between Environment Canada, Health Canada and the Province of Ontario.

AQHIScale

Observed ConditionsFootnote †


4 - Moderate Risk

Calculated at:

12:00 AM EST Friday 31 January 2025

 

Forecast Maximums


Thursday night
4 - Moderate Risk



Friday
4 - Moderate Risk



Friday night
3 - Low Risk



Saturday
3 - Low Risk




Issued at:

5:00 PM EST Thursday 30 January 2025

 

The AQHI is an initiative between Environment Canada, Health Canada and the Province of Ontario.

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